<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>页面未找到 - 404</title>
    <style>
        body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            background-color: #f8f9fa;
            color: #343a40;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            text-align: center;
            line-height: 1.6;
        }
        .container {
            max-width: 600px;
            padding: 2rem;
        }
        h1 {
            font-size: 4rem;
            margin: 0;
            color: #495057;
            font-weight: 300;
        }
        h2 {
            font-size: 1.5rem;
            margin: 1rem 0;
            font-weight: 400;
        }
        p {
            margin-bottom: 2rem;
            color: #6c757d;
        }
        .btn {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            background-color: #007bff;
            color: white;
            text-decoration: none;
            border-radius: 4px;
            transition: background-color 0.3s;
        }
        .btn:hover {
            background-color: #0056b3;
        }
        .animation {
            animation: float 3s ease-in-out infinite;
            margin-bottom: 2rem;
        }
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="animation">
            <svg width="120" height="120" viewBox="0 0 24 24" fill="none" stroke="#6c757d" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
                <path d="M10.29 3.86L1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z"></path>
                <line x1="12" y1="9" x2="12" y2="13"></line>
                <line x1="12" y1="17" x2="12.01" y2="17"></line>
            </svg>
        </div>
        <h1>404</h1>
        <h2>页面未找到</h2>
        <p>抱歉，您访问的页面不存在或已被移除。<br>请检查URL是否正确，或返回主页继续浏览。</p>
        <a href="/" class="btn">返回首页</a>
    </div>
</body>
</html>
